Pyrrolidinone-containing compatibilizers

Abstract

There is described the use of monomeric and polymeric N-pyrrolidinone-containing compounds as compatibilizers for plastic compositions, a process for improving the compatibility of plastic compositions, the improved plastic compositions obtainable thereby as well as novel polymeric N-pyrrolidinone-containing compounds.

What is claimed is:  
     
       1. A plastic composition comprising at least two different thermoplastic polymers which contains 0.5 to 50% by weight of at least one monomeric N-pyrrolidinone-containing compound of the formula I                    
       wherein 
       X is —OCH 2 CH 2 —, where the carbon atom is bound to the nitrogen,  
       R is                    
       R 1  is hydrogen, C 1 -C 18 alkyl, C 6 -C 14 aryl, C 6 -C 13 aryl which is substituted by 1 to 3 phenyl or C 1 -C 18  alkyl groups; C 5 -C 7 cycloalkyl, or C 5 -C 7 cycloalkyl which is substituted by 1 to 3 C 1 -C 18 alkyl groups, R 2  is hydrogen, C 1 -C 18 alkyl, C 6 -C 14 aryl, C 6 -C 13 aryl which is substituted by 1 to 3 phenyl or C 1 -C 18 alkyl groups; C 5 -C 7 cycloalkyl, or C 5 -C 7 cycloalkyl which is substituted by 1 to 3 C 1 -C 18 alkyl groups; and R 3  is hydrogen, C 1 -C 18 alkyl, C 6 -C 14 aryl, —COOH, C6-C 13 aryl which is substituted by 1 to 3 phenyl or C 1 -C 18 alkyl groups; C 5 -C 7 cycloalkyl, or C 5 -C 7 cycloalkyl which is substituted by 1 to 3 C 1 -C 18 alkyl groups.  
     
     
       2. A plastic composition according to  claim 1 , which is a mixture of polyethylene and polypropylene or polyethylene and polyamide. 
     
     
       3. A plastic composition according to  claim 1 , wherein the plastic composition is a recyclate. 
     
     
       4. A process for improving the compatibility of plastic compositions of at least two different thermoplastic polymers, which process comprises adding to the plastic composition 0.5 to 50% by weight of at least one monomeric N-pyrrolidinone-containing compound of formula I                    
       wherein 
       X is —OCH 2 CH 2 —, where the carbon atom is bound to the nitrogen,  
       R is                    
       R 1  is hydrogen, C 1 -C 18 alkyl, C 6 -C 14 aryl, C 6 -C 13 aryl which is substituted by 1 to 3 phenyl or C 1 -C 18 alkyl groups; C 5 -C 7 cycloalkyl, or C 5 -C 7 cycloalkyl which is substituted by 1 to 3 C 1 -C 18 alkyl groups, R 2  is hydrogen, C 1 -C 18 alkyl, C 6 -C 14 aryl, C 6 -C 13 aryl which is substituted by 1 to 3 phenyl or C 1 -C 18 alkyl groups; C 5 -C 7 cycloalkyl, or C 5 -C 7 cycloalkyl which is substituted by 1 to 3 C 1 -C 18 -alkyl groups, and R 3  is hydrogen, C 1 -C 18 alkyl, C 6 -C 14 aryl, —COOH, C 6 -C 13 aryl which is substituted by 1 to 3 phenyl or C 1 -C 18 alkyl groups; C 5 -C 7 cycloalkyl, or C 5 -C 7 cycloalkyl which is substituted by 1 to 3 C 1 -C 18 alkyl groups.  
     
     
       5. A process for improving the compatibility of plastic compositions according to  claim 4 , wherein R 1  and R 2  are hydrogen. 
     
     
       6. A process for improving the compatibility of plastic compositions according to  claim 4 , which comprises adding to the plastic composition said monomeric N-pyrrolidinone-containing compound and a radical initiator directly during the processing of the composition. 
     
     
       7. A plastic composition according to  claim 1 , wherein R 1  and R 2  are hydrogen. 
     
     
       8. A plastic composition according to  claim 1  wherein R 3  is —COOH or phenyl which is unsubstituted or substituted by one C 1 -C 12 alkyl radical or phenyl radical. 
     
     
       9. A plastic composition according to  claim 1  wherein R 1  and R 2  are hydrogen and R 3  is —COOH or phenyl which is unsubstituted or substituted by one C 1 -C 12 alkyl radical or phenyl radical. 
     
     
       10. A plastic composition according to  claim 1  wherein R is                    
     
     
       11. A plastic composition according to  claim 1  wherein R is                    
       R 1  and R 2  are hydrogen and R 3  is —COOH or phenyl which is unsubstituted or substituted by one C 1 -C 12 alkyl radical or phenyl radical. 
     
     
       12. A plastic composition according to  claim 1  wherein R is                    
     
     
       13. A process for improving the compatibility of plastic compositions according to  claim 4  wherein R 3  is —COOH or phenyl which is unsubstituted or substituted by one C 1 -C 12 alkyl radical or phenyl radical. 
     
     
       14. A process for improving the compatibility of plastic compositions according to  claim 4  wherein R 1  and R 2  are hydrogen and R 3  is —COOH or phenyl which is unsubstituted or substituted by one C 1 -C 12 alkyl radical or phenyl radical. 
     
     
       15. A process for improving the compatibility of plastic compositions according to  claim 4  wherein R is                    
     
     
       16. A process for improving the compatibility of plastic compositions according to  claim 4  wherein R is                    
       R 1  and R 2  are hydrogen and R 3  is —COOH or phenyl which is unsubstituted or substituted by one C 1 -C 12 alkyl radical or phenyl radical. 
     
     
       17. A process for improving the compatibility of plastic compositions according to  claim 4  wherein R is